STORAGE MANIAC 4-Pack Large Rustless Invisible Floating Bookshelf, Heavy-duty Book Organizer, White Durable & Strudy: made of strong steel, each bookshelf can support up to 15 pound of books Invisible: mounted on the wall, and becomes invisible behind a stack of books, make your book more orderly Multifunctional: not only books, this bookshelf can stack other things like DVDs or Albums which make your room clean and neat Assemble Easily: mounting hardwares are available in the package, you just need to mount the bookshelf on the wall Beautiful Decoration: this bookshelf not only make your books look like floating in the air but also looks beautiful and can be a decoration on your wall